I saw that Affinity runs a Facebook and Twitter account but I would also suggest that they should run a Google+ community. I don't think it is all that important to have a Google+ profile as much as it is to run a community page. I subscribe to several communities of graphics programs on there and I find that they work better then Facebook groups.
They are wonderful for displaying artwork, posts can be categorized easily, and it has a notification system that works across all Google products (YouTube, Gmail, Google search.) Despite the stigma that supposibly no one uses Google+ I find that the communities are at least as active if not more so then their corresponding FB groups.